Question

scrieti fiecare fractie ca o suma de doua fractii cu acelasi numitor iar numaratorul uneia sa fie cu 3 ma mare decit numaratorul celeilalte fractii.5/7.7/10.9/11

Answer 1

$a)\frac{5}{7}=\frac{x}{7}+\frac{x+3}{7}$

$\frac{5}{7}=\frac{2x+3}{7}$

$5=2x+3$

$2=2x$

$x=1$

$Raspuns:\frac{5}{7}=\frac{1}{7}+\frac{4}{7}$

$b)\frac{7}{10}=\frac{y}{10}+\frac{y+3}{10}$

$\frac{7}{10}=\frac{2y+3}{10}$

$7=2y+3$

$4=2y$

$y=2$

$Raspuns:\frac{7}{10}=\frac{2}{10}+\frac{5}{10}$

$c)\frac{9}{11}=\frac{z}{11}+\frac{z+3}{11}$

$\frac{9}{11}=\frac{2z+3}{11}$

$9=2z+3$

$6=2z$

$z=3$

$Raspuns:\frac{9}{11}=\frac{3}{11}=\frac{6}{11}$